<template>
  <div class="food" v-show="showFlag" transition="move" v-el:food>
    <div class="food-content">
      <div class="image-header">
        <img :src="food.image">
        <div class="back" @click="hide">
          <i class="icon-arrow_lift"></i>
        </div>
      </div>
      <div class="content">
        <h1 class="title">{{food.name}}</h1>
        <div class="detail">
          <span class="sell-count">月售{{food.sellCount}}份</span>
          <span class="rating">好评率{{food.rating}}%</span>
        </div>
        <div class="price">
          <span class="now">￥{{food.price}}</span>
          <span class="old" v-show="food.oldPrice">￥{{food.oldPrice}}</span>
        </div>
        <div class="cartcontrol-wrapper">
         <cartcontrol :food="food"></cartcontrol>
        </div>
        <div class="buy" v-show="!food.count || food.count === 0" @click.stop.prevent="addFirst($event)" transition="fade">
          加入购物车
        </div>
      </div>
      <split v-show="food.info"></split>
      <div class="info" v-show="food.info">
        <h1 class="title">商品信息</h1>
        <p class="text">{{food.info}}</p>
      </div>
      <split></split>
      <div class="rating">
        <h1 class="title">商品评价</h1>
        <ratingselect :select-type="selectType" :only-content="onlyContent" :desc="desc" :ratings="food.ratings"></ratingselect>
        <div class="rating-wrapper">
          <ul v-show="food.ratings && food.ratings.length">
            <li v-for="rating in food.ratings"  v-show="needShow(rating.rateType, rating.text)" class="rating-item border-1px">
              <div class="user">
                <span class="name">{{rating.username}}</span>
                <img class="avatar" width="12" height="12" :src="rating.avatar">
              </div>
              <div class="time">{{rating.rateTime | formatDate}}</div>
              <p class="text">
                <span :class="{'icon-thumb_up': rating.rateType===0, 'icon-thumb_down': rating.rateType===1}"></span>
                {{rating.text}}
              </p>
            </li>
          </ul>
          <div class="no-rating" v-show="!food.ratings || !food.ratings.length">暂无评价</div>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
import Vue from 'vue'
import BScroll from 'better-scroll'
import cartcontrol from '../cartcontrol/cartcontrol.vue'
import split from '../split/split.vue'
import ratingselect from '../ratingselect/ratingselect'
import {format} from '../../common/js//date'
// const POSITIVE = 0  //  定义个正面性评价
// const NEGATIVE = 1  //  定义个负面性评价
const ALL = 2 //  所有评价

export default {
  props: {
    food: {
      type: Object
    }
  },
  data () {
    return {
      showFlag: false,
      selectType: ALL,
      onlyContent: true,
      desc: {
        all: '全部',
        positive: '推荐',
        negative: '吐槽'
      }
    }
  },
  components: {
    cartcontrol,
    split,
    ratingselect
  },
  methods: {
    show () {
      this.showFlag = true
      this.selectType = ALL
      this.onlyContent = true
      this.$nextTick(() => {
        if (!this.scroll) {
          this.scroll = new BScroll(this.$els.food, {
            click: true
          })
        } else {
          this.scroll.refresh()
        }
      })
    },
    hide () {
      this.showFlag = false
    },
    addFirst (event) {
      // 防止pc多次点击
      if (!event._constructed) {
        return
      }
      this.$dispatch('cart.add', event.target)
      Vue.set(this.food, 'count', 1)  //  设置对象的属性。如果对象是响应式的，确保属性被创建后也是响应式的，同时触发视图更新。这个方法用于避开Vue不能检测属性被添加的限制。
    },
    needShow (type, text) {
      if (this.onlyContent && !text) {
        return false  //  是否要显示这个内容，要展示,但是没有文本,所以返回false
      }
      if (this.selectType === ALL) {
        return true
      } else {
        return type === this.selectType
      }
    }
  },
  events: {
    'ratingtype.select' (type) {
      this.selectType = type
      this.$nextTick(() => {
        this.scroll.refresh()
      })
    },
    'content.toggle' (onlyContent) {
      this.onlyContent = onlyContent
      this.$nextTick(() => {
        this.scroll.refresh()
      })
    }
  },
  filters: {
    formatDate (time) {
      let date = new Date(time)
      return format(date, 'yyyy-MM-dd hh:mm')
    }
  }
}
</script>
<style lang="stylus" rel="stylesheet/stylus">
@import '../../common/styls/mixin.styl'
  .food
    position fixed
    left 0
    right 0
    top 0
    bottom 48px
    z-index 30
    width 100%
    background #fff
    &.move-transition
      transition all .2s linear
      transform translate3d(0, 0, 0)
    &.move-enter, &.move-leave
      transform translate3d(100%, 0, 0)
    .image-header
      position relative
      width 100%
      height 0
      padding-top 100%
      img 
        position absolute
        top 0
        left 0
        width 100%
        height 100%
      .back
        position absolute
        top 10px
        left 0
        .icon-arrow_lift
          display block
          padding 10px
          font-size 20px
          color #fff
    .content
      position relative
      padding 18px
      .title
        line-height 14px
        margin-bottom 8px
        font-size 14px
        font-weight 700
        color rgb(7, 17, 27)
      .detail
        height 10px
        margin-bottom 18px
        font-size 0
        line-height 10px
        .sell-count, .rating
          font-size 10px
          color rgb(147, 153, 159)
        .sell-count
          margin-right 12px
      .price
        font-size 0
        font-weight 700
        line-height 24px
        .now
          color rgb(240, 20, 20)
          margin-right 8px
          font-size 14px
        .old
          font-size 10px
          color rgb(147, 153, 159)
          text-decoration line-through
      .cartcontrol-wrapper
        position absolute
        right 12px
        bottom 12px
      .buy 
        position absolute
        right 18px
        bottom 18px
        z-index 10
        height 24px
        line-height 24px
        padding 0 12px
        box-sizing border-box
        font-size 10px
        border-radius 12px
        color #ffffff
        background rgb(0, 160, 220)
        &.fade-transition
          transition all .4s
          opacity 1
        &.fade-enter, &.fade-leave
          opacity 0
    .info
      padding 18px
      .title
        line-height 14px
        margin-bottom 6px
        font-size 14px
        color rgb(7, 17, 27)
      .text
        line-height 24px
        padding 0 8px
        font-size 12px
        color rgb(77, 85, 93)
    .rating
      padding-top 18px
      .title
        line-height 14px
        margin-left  18px
        font-size 14px
        color rgb(7, 17, 27)
      .rating-wrapper
        padding 0 18px
        .rating-item
          position relative
          padding 16px 0
          border-1px(rgba(7, 17, 27, 0.1))
          .user
            position absolute
            right 0
            top 16px
            font-size 0
            line-height 12px
            .name
              display inline-block
              vertical-align top
              margin-right 6px
              font-size 10px
              color rgb(147, 153, 159)
            .avatar
              display inline-block
              vertical-align top
              border-radius 50%
          .time
            margin-bottom 6px
            line-height 12px
            font-size 10px
            color rgb(147, 153, 159)
          .text
            line-height 16px
            font-size 12px
            color rgb(7, 17, 27)
            .icon-thumb_up, .icon-thumb_down
              margin-right 4px
              line-height 16px
              font-size 12px
            .icon-thumb_up
              color rgb(0, 160, 220)
            .icon-thumb_down
              color rgb(147, 153, 159)
       .no-rating
          padding 16px 0
          font-size 12px
          color rgb(147, 153, 159)



          
</style>